Attachment for refrigerating systems



Oct. 29, 1935. E, LlNK 2,019,421

ATTACHMENT FOR REFRIGERATING SYSTEMS Filed Sept. 13, 1934 3 Sheets-Sheet1 Inventor .Z? .771; 2 2$ M 1935- E. T. LINK 2,019,421

ATTACHMENT FOR REFRIGERATING SYSTEMS Filed Sept. 13, 1934 5 Sheets-Sheet2 I fivento'r Attorney I Oct. 29, 1935. E. T. LINK I ATTACHMENT FORREFRIGERATING SYSTEMS Filed Sept. 15, 1954 s Sheets-Sheet s j InventorPatented Oct. 29, 1935 UNITED STATES FATE ATTACHLIENT FOR REFRIGERATINGSYSTEMS Edgar T. Link, Allentown, Pa.

Application September 13, 1934, Serial No. 743,921

4 Claims.

This invention relates to an attachment for a refrigerating system, thegeneral object of the invention being to provide means whereby thesystem can be easily serviced, and voided, with means for automaticallyvoiding the system in case of fire.

This invention also consists in certain other features of constructionand in the combination and arrangement of several parts, to behereinafter fully described, illustrated in the accompanying drawingsand specifically pointed out in the appended claims.

In describing the invention in detail, reference will be had to theaccompanying drawings wherein like characters denote like orcorresponding parts throughout the several views, and in which:

Fig. 1 is an elevation of the device.

Fig. 2 is a vertical sectional view thereof.

Fig. 3 is a section on line 33 of Fig. 2.

Fig. 4. is a section on line 4-4 of Fig. 2.

Fig. 5 is a view of the lower part of the pointed stem.

Fig. 6 is a view of the split ring for holding a filter screen inposition.

Fig. '7 is a view of the screen.

Fig. 8 is a view of another part of the valve assembly.

In these drawings, the numeral I indicates the 30 body of the devicewhich has a plug 2 closing its upper end, the plug being provided with athreaded hole 3 for receiving a line leading from the system. The upperpart of the body forms a chamber 4 which contains the refrigerant drying35 material 5, such as anhydrous calcium chloride. This material restson a filter or screen disk 6 which in turn rests on a split ring Iseated on a shoulder 8 formed at the bottom of the chamber, said bottomhaving a recess 9 therein of smaller 40 diameter than the chamber so asto provide the shoulder and this recess and the disk seated on the ringforms a space below the material 5. A smaller chamber I0 is formed inthe lower part of the body and is separated from the first 45 chamber bya partition forming part II of the body which is provided with acentrally arranged passage I2 connecting the two chambers together. Atubular stem I3 has its upper end threaded in the lower end of thepassage I2 and the bore of the stem forms a continuation of the passageI2 with the lower end of the stem spaced a considerable distance fromthe bottom of the chamber II'I. Flanges I4 are formed on the stem andact as stops for a float disk I5 which is preferably white so that itwill readily be distinguished from by a part of the glass cylinder sothat the stem 16 and the float and a portion of the interior of thechamber can be seen. The lower part of the body is of less diameter thanthe upper portion and an intermediate part is threaded as at 2I for Ireceiving the threaded upper end of a cap or cover 22 which covers theWindow and prevents the glass cylinder from being broken so the covercan easily be removed when the parts are to be observed through thewindow. An outlet passage 23 extends from the top of the chamber Illthrough a side portion of the part II, the outer end of the passagebeing enlarged and threaded to receive the threaded end of a Valvecasing 24. This casing is adapted to be connected in any suitable mannerto the evapo- 25 rator by its threaded outer end 25 and a valve 26controls the bore of the casing, said valve having its stem 21 passingthrough a gland 23 and having a wrench engaging part 29 at its outerend. A tube 30 is connected with the valve casing and 30 a cap 3Iconnects the outer end of the tube with a pipe 33 and a disk 35 offusible material normally closes communication between the tube 39 andthe pipe 33 and if a fire occurs, this disk will melt and thus therefrigerating system will 35 be drained.

A stem 35 slidingly passes through the stem 21 and has a handle 36threaded to its upper end and a threaded intermediate part of the stem35 is threaded in a socket formed in the lower end of 40 the valve 28,as shown at 31, and the stem 35 carries a collar 38 having a gasketthereon for forming a fiuid tight connection with the lower end of thevalve when the parts are in the position shown in Figure 2. The lowerend of the stem 35 is pointed so that by unscrewing the stem 35 from thevalve 28 and pressing upon the stem 35 it can be forced downwardly tocause its pointed end to puncture the disk 34 so that the system can bedrained and by connecting thepipe 33 to a source of supply the systemcan be charged or this pipe 33 can be used for bypassing the fluid fromone part of the system to another part. By lowering the valve 28 uponthe seat formed at the upper end of the tube 30 the pipe 33 can bedisconnected from the rest of the system.

As will be seen, the refrigerant fluid entering the device must firstpass through the material 5 in the chamber 4 which will remove moistureand then pass through the filter 6 which removes dirt and then the fluidenters the passage l2 and flows through the stem into the chamber I0. Asit passes from the stem, it strikes the reflector I8 carried by thewasher l8 and then the fluid passes upwardly filling the cylinder andfinally passes through the passage 23 through the valve casing 24 to theevaporator. Any dirt passing the filter will drop by gravity onto thedeflector l8 and'the fluid will wash this dirt from the deflector intothe bottom of the chamber H! where it can be removed whenever desired.The fluid in the chamber l0 will of course act on the float t5 sothatone can see whether or not the chamber is full, empty or partly full byobserving the float through the window 2%] after removing the cover 22.This provides means whereby the operator servicing the system canreadily tell when the tubing or lines to which the device is attached.are empty without opem'ng any valves or the like, thereby eliminatingdanger of odors from the escaping fluid and loss of fluid. By making thestem I? of material that will corrode, the corrosion of this stem willindicate that the fluid contains moisture and thus the drying materialis not functioning properly. By raising the compressor at one end, theamount of liquid in the receiver or condenser can be ascertained bylooking through the window 20.

This invention aids the service-man to service the job by sight insteadof by guess work and by the use of gauges and eliminates disagreeableodors, loss of fluid and other objectionable features of servicing arefrigerating system in the usual way. The device also shows theserviceman by sight whether dirt and moisture are collecting in thesystem and the proper amount of oil and fluid is flowing through. Theattachment can be located wherever desired in the system.

It is thought from the foregoing description that the advantages andnovel features of the invention will be readily apparent.

It is to be understood that changes may be made in the construction andin the combination and arrangement of the several parts, provided thatsuch changes fall within the scope of the appended claims.

I claim:

1. An attachment for a refrigerating system comprising a body havingupper and lower chambers therein and a passage connecting the chamberstogether, that part of the body containing the lower chamber having awindow therein, the upper chamber receiving the fluid from the system, astem located in the lower chamber and having its upper end incommunication with the passage, a float carried by the stem, .2. glasscylinder in the lower chamber, said stem having its lower end.terminating an appreciable distance above the lower end of the lowerchamber and discharge means connected with the top of the lower chamber.

2. An attachment of the class described comprising a body having upperand lower chambers therein and a passage connecting the chamberstogether, the top of the upper chamber having an inlet .'the lower partof the body having a window therein for communication with the lowerchamber, a glass cylinder in the lower chamber covering the window, astem having its upper end in communication with the passage and itslower end spaced an appreciable distance from the lower end of the lowerchamber, a floatcarried by the stem, means carried by the stem forlimiting upward and downward movement of the float, a reflector in thebottom of the lower chamber located under the stem, discharge meansconnected with the top of the lower chamber, and a detachable capconnected with the lower part of the body and covering the window.

3. An attachment of the class described com prising a body having upperand lower chambers therein and a passage connecting the chamberstogether, the top of the upper chamber having an inlet, the lower partof the body having a window therein for communication with the lowerchamber, a glass cylinder in the lower chamber covering the window, astem having its upper end in communication with the passage and itslower end spaced an appreciable distance from the lower end of the lowerchamber, a float carried by the stem, means carried by the stem forlimiting upward and downward movement of the float, a reflector in thebottom of the lower chamber located under the stem, discharge meansconnected with the top of the lower chamber, a detachable cap connectedwith the lower part of the body and covering the window, said'dischargemeans including a valve casing, a manually operated valve for saidcasing, a tube carried by the casing, a pipe connected with the tube aremovable fusible disk separating the tube from the pipe, and manuallyoperated means for puncturing the disk.

4. An attachment for a refrigerating system comprising a body havingupper and lower chambers'thereimthe upper chamber having an inlet, andan outlet for the top of the lower chamber, a conduit connecting the twochambers together, said'conduit including a stem extending into thelower chamber and formed of corrosive material,

afioatcarried by the stem, the walls of the lower chamber having awindow therein, a transparent member in the lower chamber extendingacross the window and a removable cap for closing the window.

EDGAR 'T. LINK.

